Last Modified 17/4/26 10:26 AM
2 day forecast
Friday
Risk of
Rain (%)
Likely
amount (mm)
Winds
Saturday
Morning
10%
Moderate NE
90%
1-3
Fresh N
Afternoon
Fresh NE
Evening
50%
Night
5-10
Max
Min
Cloudy
18
14
Rain
19
15
Fine and sunny today with high cloud increasing and mild north to northeasterly winds freshening. A period of rain tonight.
Early rain clearing tomorrow morning and then dry, but remaining cloudy. Rather mild and humid, with breezy northerly winds again.
12 day forecast
Risk of Rain
Amount (mm)
E.T.
Temp
Airflow
Weather Watch
3-5
Mild & humid
Light E
Sunday
Mild/cold
Increasing S
Monday
Cold
Moderate S
Snow to 700m. 20-50mm in North Canterbury
Tuesday
20-50mm North Canty
Wednesday
20-50
50-100mm North Canty
Thursday
70%
Decreasing SE
10-20mm North Canty
Friday to Sun
Cool
Monday to Wed
80%
Snow on the hills
Predicted rainfall
By Friday 71mm (9-177mm), by the following Friday 89mm (11-212mm)
Fine at first on Sunday with high cloud, but cloud increasing and lowering during the morning and some rain developing during the afternoon. Mild at first with light northerlies, cooler southwesterlies spreading north later on.
Overcast Monday with periods of rain, light and scattered in Mid and South Canterbury but with snow flurries above 700m. Heavier rain in North Canterbury.
Overcast on Tuesday and Wednesday. Scattered light rain and drizzle patches at times in South Canterbury. More persistent rain in Mid Canterbury. Heavy rain in North Canterbury. Snow generally above 1000m. Cold with fresh gusty southerly winds, strong at times on Banks Peninsula.
Rain easing on Thursday and cold southerlies decreasing.
Mostly fine and sunny next Friday to Sunday with cool temperatures and light easterly quarter winds.
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Evapotranspiration ET₀ (mm/day)
Location
Fri 17 Apr
Sat 18 Apr
Sun 19 Apr
Mon 20 Apr
Tue 21 Apr
Wed 22 Apr
Thu 23 Apr
Fri 24 Apr
Sat 25 Apr
Sun 26 Apr
Mean
Culverden
2.35
1.64
1.39
0.37
0.40
0.47
0.53
0.82
1.37
0.97
Rangiora
2.41
2.16
1.60
0.52
0.44
0.38
0.50
0.60
1.07
1.43
1.11
Darfield
2.08
2.12
0.72
0.29
0.99
1.04
Ashburton
2.17
2.11
1.41
0.31
0.56
0.70
1.03
1.46
Methven
1.54
1.16
0.41
0.26
0.25
0.46
1.52
0.92
Hinds
2.38
2.55
1.51
1.27
0.58
0.75
0.84
1.34
Temuka
2.26
1.49
1.19
1.18
1.02
1.15
Rainfall (mm)
Total
2.6
18.2
7.1
48.8
64.8
86.1
27.2
1.8
0.7
0.0
257.3
0.5
4.4
9.8
23.8
30.7
62.5
30.3
3.0
165.0
1.6
7.0
5.4
20.8
49.3
1.3
96.8
1.7
5.1
11.0
28.9
6.0
55.7
8.1
7.6
6.1
13.7
17.4
37.1
1.1
0.8
97.9
3.7
6.5
26.9
9.6
49.9
0.4
4.5
6.4
17.8
32.3
Cumulative Water Balance (mm)
Final
+0.2
+16.8
+22.5
+71.0
+135.3
+221.0
+247.8
+249.0
+248.9
+247.6
-1.9
+0.3
+8.5
+31.8
+62.1
+124.2
+154.0
+156.4
+155.3
+153.9
-0.5
+1.8
+7.4
+12.1
+32.5
+81.5
+88.0
+88.8
+87.8
+86.4
-0.9
-1.3
-1.0
+3.3
+13.8
+42.4
+47.8
+47.1
+46.1
+44.6
+6.6
+17.0
+30.3
+47.4
+84.3
+89.8
+90.4
+90.2
+88.7
-1.7
-3.4
-1.2
-0.8
+4.7
+31.0
+39.8
+39.0
+37.9
+36.5
-3.2
-3.1
+0.1
+5.3
+22.4
+22.0
+21.0
+19.8
+18.6
© 2026 Blue Skies Weather & Climate Services Ltd
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